Where is the leash, treats, water dish, towel for rainy days, etc
Does dog have any aggressive tendencies, pick things off the street, scavenge for food, get along with other dogs, etc.
Do they get fed, how long can they be outside for, and training commands, etc
Quick evaluation of dog (will they need to be walked solo at first, any issues pairing with other dogs, etc) anything else discussed during meet and greet. Ask walker their thoughts on pairings before submitting (but after leaving client's home).